Re: [Qemu-devel] [PATCH v3 1/8] memory: address_space_iterate

[Paolo Bonzini]

On 12/12/2017 12:03, Dr. David Alan Gilbert wrote:
>> nop means that attributes (readonly, romd_mode, mr+offset_in_region)
>> haven't changed; nop is optionally followed by log_start or log_stop.
>> If any of them changes, you get del+add (del is always before add).
>>
>>> Th nice thing we have here is we get a full walk of the physical memory
>>> in order; keeping it in order makes our data structure easy for merging.
>> That's the same that you get with region_del/add.
> Hmm it would be good if that was documented somewhere.
> I thought you'd only get an _add/_del and then a commit.
> 
> However, what do I do in vhost_dev_start?  At the moment I'm forcfully
> regenerating it using the same code.

When you add a listener, you get adds and a commit for the current state
of the AddressSpace.

Paolo